//package com.fac.utils;
//
//import com.alibaba.fastjson.JSON;
//import com.alibaba.fastjson.JSONObject;
//import com.sky.properties.WeChatProperties;
//import com.wechat.pay.contrib.apache.httpclient.WechatPayHttpClientBuilder;
//import com.wechat.pay.contrib.apache.httpclient.util.PemUtil;
//import org.apache.commons.lang.RandomStringUtils;
//import org.apache.http.HttpHeaders;
//import org.apache.http.client.methods.CloseableHttpResponse;
//import org.apache.http.client.methods.HttpGet;
//import org.apache.http.client.methods.HttpPost;
//import org.apache.http.entity.ContentType;
//import org.apache.http.entity.StringEntity;
//import org.apache.http.impl.client.CloseableHttpClient;
//import org.apache.http.util.EntityUtils;
//import org.springframework.beans.factory.annotation.Autowired;
//import org.springframework.stereotype.Component;
//
//import java.io.File;
//import java.io.FileInputStream;
//import java.io.FileNotFoundException;
//import java.math.BigDecimal;
//import java.security.PrivateKey;
//import java.security.Signature;
//import java.security.cert.X509Certificate;
//import java.util.ArrayList;
//import java.util.Arrays;
//import java.util.Base64;
//import java.util.List;
//
///**
// * 微信支付工具类
// */
//@Component
//public class WeChatPayUtil {
//
//    //微信支付下单接口地址
//    public static final String JSAPI = "https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi";
//
//    //申请退款接口地址
//    public static final String REFUNDS = "https://api.mch.weixin.qq.com/v3/refund/domestic/refunds";
//
//    @Autowired
//    private WeChatProperties weChatProperties;
//
//    /**
//     * 获取调用微信接口的客户端工具对象
//     *
//     * @return
//     */
//    private CloseableHttpClient getClient() {
//        PrivateKey merchantPrivateKey = null;
//        try {
//            //merchantPrivateKey商户API私钥，如何加载商户API私钥请看常见问题
//            merchantPrivateKey = PemUtil.loadPrivateKey(new FileInputStream(new File(weChatProperties.getPrivateKeyFilePath())));
//            //加载平台证书文件
//            X509Certificate x509Certificate = PemUtil.loadCertificate(new FileInputStream(new File(weChatProperties.getWeChatPayCertFilePath())));
//            //wechatPayCertificates微信支付平台证书列表。你也可以使用后面章节提到的“定时更新平台证书功能”，而不需要关心平台证书的来龙去脉
//            List<X509Certificate> wechatPayCertificates = Arrays.asList(x509Certificate);
//
//            WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
//                    .withMerchant(weChatProperties.getMchid(), weChatProperties.getMchSerialNo(), merchantPrivateKey)
//                    .withWechatPay(wechatPayCertificates);
//
//            // 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签
//            CloseableHttpClient httpClient = builder.build();
//            return httpClient;
//        } catch (FileNotFoundException e) {
//            e.printStackTrace();
//            return null;
//        }
//    }
//
//    /**
//     * 发送post方式请求
//     *
//     * @param url
//     * @param body
//     * @return
//     */
//    private String post(String url, String body) throws Exception {
//        CloseableHttpClient httpClient = getClient();
//
//        HttpPost httpPost = new HttpPost(url);
//        httpPost.addHeader(HttpHeaders.ACCEPT, ContentType.APPLICATION_JSON.toString());
//        httpPost.addHeader(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.toString());
//        httpPost.addHeader("Wechatpay-Serial", weChatProperties.getMchSerialNo());
//        httpPost.setEntity(new StringEntity(body, "UTF-8"));
//
//        CloseableHttpResponse response = httpClient.execute(httpPost);
//        try {
//            String bodyAsString = EntityUtils.toString(response.getEntity());
//            return bodyAsString;
//        } finally {
//            httpClient.close();
//            response.close();
//        }
//    }
//
//    /**
//     * 发送get方式请求
//     *
//     * @param url
//     * @return
//     */
//    private String get(String url) throws Exception {
//        CloseableHttpClient httpClient = getClient();
//
//        HttpGet httpGet = new HttpGet(url);
//        httpGet.addHeader(HttpHeaders.ACCEPT, ContentType.APPLICATION_JSON.toString());
//        httpGet.addHeader(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.toString());
//        httpGet.addHeader("Wechatpay-Serial", weChatProperties.getMchSerialNo());
//
//        CloseableHttpResponse response = httpClient.execute(httpGet);
//        try {
//            String bodyAsString = EntityUtils.toString(response.getEntity());
//            return bodyAsString;
//        } finally {
//            httpClient.close();
//            response.close();
//        }
//    }
//
//    /**
//     * jsapi下单
//     *
//     * @param orderNum    商户订单号
//     * @param total       总金额
//     * @param description 商品描述
//     * @param openid      微信用户的openid
//     * @return
//     */
//    private String jsapi(String orderNum, BigDecimal total, String description, String openid) throws Exception {
//        JSONObject jsonObject = new JSONObject();
//        jsonObject.put("appid", weChatProperties.getAppid());
//        jsonObject.put("mchid", weChatProperties.getMchid());
//        jsonObject.put("description", description);
//        jsonObject.put("out_trade_no", orderNum);
//        jsonObject.put("notify_url", weChatProperties.getNotifyUrl());
//
//        JSONObject amount = new JSONObject();
//        amount.put("total", total.multiply(new BigDecimal(100)).setScale(2, BigDecimal.ROUND_HALF_UP).intValue());
//        amount.put("currency", "CNY");
//
//        jsonObject.put("amount", amount);
//
//        JSONObject payer = new JSONObject();
//        payer.put("openid", openid);
//
//        jsonObject.put("payer", payer);
//
//        String body = jsonObject.toJSONString();
//        return post(JSAPI, body);
//    }
//
//    /**
//     * 小程序支付
//     *
//     * @param orderNum    商户订单号
//     * @param total       金额，单位 元
//     * @param description 商品描述
//     * @param openid      微信用户的openid
//     * @return 支付结果
//     */
//    public JSONObject pay(String orderNum, BigDecimal total, String description, String openid) throws Exception {
//        //统一下单，生成预支付交易单
//        String bodyAsString = jsapi(orderNum, total, description, openid);
//        //解析返回结果
//        JSONObject jsonObject = JSON.parseObject(bodyAsString);
//        System.out.println(jsonObject);
//
//        String prepayId = jsonObject.getString("prepay_id");
//        if (prepayId != null) {
//            String timeStamp = String.valueOf(System.currentTimeMillis() / 1000);
//            String nonceStr = RandomStringUtils.randomNumeric(32);
//            ArrayList<Object> list = new ArrayList<>();
//            list.add(weChatProperties.getAppid());
//            list.add(timeStamp);
//            list.add(nonceStr);
//            list.add("prepay_id=" + prepayId);
//            //二次签名，调起支付需要重新签名
//            StringBuilder stringBuilder = new StringBuilder();
//            for (Object o : list) {
//                stringBuilder.append(o).append("\n");
//            }
//            String signMessage = stringBuilder.toString();
//            byte[] message = signMessage.getBytes();
//
//            Signature signature = Signature.getInstance("SHA256withRSA");
//            signature.initSign(PemUtil.loadPrivateKey(new FileInputStream(new File(weChatProperties.getPrivateKeyFilePath()))));
//            signature.update(message);
//            String packageSign = Base64.getEncoder().encodeToString(signature.sign());
//
//            //构造数据给微信小程序，用于调起微信支付
//            JSONObject jo = new JSONObject();
//            jo.put("timeStamp", timeStamp);
//            jo.put("nonceStr", nonceStr);
//            jo.put("package", "prepay_id=" + prepayId);
//            jo.put("signType", "RSA");
//            jo.put("paySign", packageSign);
//
//            return jo;
//        }
//        return jsonObject;
//    }
//
//    /**
//     * 申请退款
//     *
//     * @param outTradeNo    商户订单号
//     * @param outRefundNo   商户退款单号
//     * @param refund        退款金额
//     * @param total         原订单金额
//     * @return 退款结果
//     */
//    public String refund(String outTradeNo, String outRefundNo, BigDecimal refund, BigDecimal total) throws Exception {
//        JSONObject jsonObject = new JSONObject();
//        jsonObject.put("out_trade_no", outTradeNo);
//        jsonObject.put("out_refund_no", outRefundNo);
//
//        JSONObject amount = new JSONObject();
//        amount.put("refund", refund.multiply(new BigDecimal(100)).setScale(2, BigDecimal.ROUND_HALF_UP).intValue());
//        amount.put("total", total.multiply(new BigDecimal(100)).setScale(2, BigDecimal.ROUND_HALF_UP).intValue());
//        amount.put("currency", "CNY");
//
//        jsonObject.put("amount", amount);
//        jsonObject.put("notify_url", weChatProperties.getRefundNotifyUrl());
//
//        String body = jsonObject.toJSONString();
//
//        //调用申请退款接口
//        return post(REFUNDS, body);
//    }
//}
